China Alleges Cyberattacks Originated in U.S.

BEIJING—China's Ministry of Defense said two military websites were the targets of more than 100,000 cyberattacks a month last year, with almost two-thirds of them originating in the U.S.

It was the most specific statement to date from the Chinese government since Internet security firm Mandiant released a report in February that linked the Chinese military to attacks across the globe, including against U.S. corporations and...